Department of Entomology and Nematology, University of California Davis, Davis, California, USA.
Ecol Lett. 2024 Aug;27(8):e14492. doi: 10.1111/ele.14492.
A rapidly warming climate is driving changes in biodiversity worldwide, and its impact on insect communities is critical given their outsized role in ecosystem function and services. We use a long-term dataset of North American bumble bee species occurrences to determine whether the community temperature index (CTI), a measure of the balance of warm- and cool-adapted species in a community, has increased given warming temperatures. CTI has increased by an average of 0.99°C in strong association with warming maximum summer temperatures over the last 30 years with the areas exhibiting the largest increases including mid- to high latitudes as well as low and high elevations-areas relatively shielded from other intensive global changes. CTI shifts have been driven by the decline of cold-adapted species and increases in warm-adapted species within bumble bee communities. Our results show the pervasive impacts and ecological implications warming temperatures pose to insects.
快速变暖的气候正在推动全球生物多样性的变化，鉴于昆虫在生态系统功能和服务中起着巨大的作用，其变化对昆虫群落的影响至关重要。我们使用了一个长期的北美大黄蜂物种出现的数据组，以确定社区温度指数（CTI）是否随着温度的升高而增加，CTI 是衡量一个群落中温暖和寒冷适应物种平衡的指标。在过去 30 年中，随着变暖的夏季最高温度的强烈关联，CTI 平均增加了 0.99°C，表现出最大增幅的地区包括中高纬度地区以及低海拔和高海拔地区——这些地区相对免受其他密集的全球变化的影响。CTI 的变化是由寒冷适应物种的减少和大黄蜂群落中温暖适应物种的增加驱动的。我们的研究结果表明，变暖的温度对昆虫的普遍影响和生态意义。
